Improvement in lifting-jacks



J. B. FAYETTE 89 L. MEEKER.

LIFTING-J'ACK.

Patented Apr'1118,1876.

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KFEIERS, VHQTO-UTHOGRAPHER, WASHINGTON. D C.

NITED STATES PATENT OFFICE.

JOHN B. FAYETTE AND LORENZO MEEKER, OF OSWEGO, NEW YORK.

IMPROVEMENT IN LlFTING-JACKS.

Specification forming part of Letters Patent No. 176,220, dated April18, 1876; application filed March 25, 1876. D

To all whom t may concern:

Be it known that we, JOHN B. FAYETTE and LORENZO MEEIIER, of Oswego, inthe county ot' Oswego and State ot' New York, have invented a new anduseful Improvement in Lifting-Jacks, of which the following is aspecification:

Figure l is a side view of our improved li ting-jack, part being brokenaway to show the construction. Fig. 2 is a vertical section of the same.

Similar letters of reference indicate corresponding parts.

The object of this invention is to improve the construction ot' tliftingjack for which Letters Patent Noflli were granted to us July 13,1875, so a to make it' more convenient in use and give it a greaterrange and a greater accuracy of adjustment.

The invention consists in the combination of the eccentric with the basetube and the sliding tube of the liftingjack.

A is the tubular standard, to the lower end of which is attached a baseplate, B, of such a size as to give a firm and stable support tothejack. O is a tube, which may be made of a less diameter than the tubeA, so as to iit into and slide up and down in the said tube A, or it maybe made of the saine size as the tube A, and have a smaller rod or tubeattached to its lower end to fit into and slide in the said tube AJ D isa short tube or rod that ts into and slides up and down in the upperpart of the tube C, and which has a head, E, attached to its upper endto receive the object to be raised. To the side of the upper part of thetube or rod D, or to the head E, is pivoted the upper end ot' a shortconnecting-rod, F, the lower end of which is pivoted to the end of thelever G. The lever Gr, at a little distance from its forward end, ispivoted to a bracket or brackets, H, attached to the tube C. The rod Dis lowered to place the jack beneath the object to be raised, and israised to lift said object. In the lever G, at a little distance fromits pivoting-point, is formed an angle or bend, so that a longer levermay be used than is practicable when the said lever is straight. In theside of the upper part ofthe tube A is formed a short longitudinal slot,to receive an eccentric, I, which is pivoted to a band, J, passed aroundand secured to the said tube A, or by a cap screwed to the top of base,with eccentric attached. The eccentric I is provided with alever-handle, K, for convenience in operating it. By this construction,when the tube C has been adjusted at the proper height, it is locked inplace by turning the eccentric I K. This construction enables the jackto be accurately adjusted to any desired height.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

The combination of the eccentric I K with the base tube A and thesliding tube C ot' the lifting-jack, substantially as herein shown anddescribed.

JOHN B. FAYETTE. LORENZO MEEKER. Witnesses:

LYMoN CooN, WILLIAM LINDSAY.

